Patents by Inventor Roland E. Legoff

Roland E. Legoff has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Rotary, flat metallic fluid-tight and thrust-resisting seal and the method of manufacture thereof
    Patent number: 4722533
    Abstract: In the process for the machining of a rotary flat fluid-tight seal by grinding, the working surface of the grinding wheel has imparted to it an inclination with respect to the annular surface of the seal, in such a manner as to leave behind on the said surface of the seal traces which are termed "in half-sun" at the intersection of the grinding wheel and of the seal along a chord. The inclination is provided by modifying the height of one of two headstocks of a grinding machine and by pivoting the table of the grinding machine in a horizontal plane. The fluid-tight seal thus produced provides a leakage flow of lubricating fluid and thus can be used as an axial thrust seal and bearing of a rotary shaft, especially for pumps.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: February 2, 1988
    Assignee: Societe Nationale d'Etude et de Constructions de Moteur d'Aviation "S.N.E.C.M.A."
    Inventors: Claude G. E. Collin, Guy M. Desmat, Roland E. Legoff